import math
-from bulletml import parser, errors
+from bulletml import parser
# TODO(jfw): This is very non-Pythonic, it's pretty much just the
# BulletML reference ActionImpl translated to Python.
self.params = params
self.rank = rank
self.pc = -1
+ self.finished = False
if parent:
self.copy_state(parent)
return "%s(pc=%r, actions=%r)" % (
type(self).__name__, self.pc, self.actions)
- @property
- def finished(self):
- return self.pc is None
-
def vanish(self):
+ """End this action and its parents."""
if self.parent:
self.parent.vanish()
self.pc = None
+ self.finished = True
def copy_state(self, other):
+ """Copy fire/movement state from other to self."""
self.direction_frames = other.direction_frames
self.direction = other.direction
self.aiming = other.aiming
self.previous_fire_speed = other.previous_fire_speed
def step(self):
+ """Advance by one frame."""
created = []
if self.speed_frames > 0:
self.repeat -= 1
if self.repeat <= 0:
self.pc = None
+ self.finished = True
if self.parent is not None:
self.parent.copy_state(self)
self.owner.replace(self, self.parent)
self.actions = []
if rank is None:
rank = parent.rank if parent else 0.5
- for action, params in actions:
- # New bullets reset the parent hierarchy.
- self.actions.append(Action(self, None, action, params, rank))
+ # New bullets reset the parent hierarchy.
+ self.actions = [Action(self, None, action, params, rank)
+ for action, params in actions]
def __repr__(self):
return ("%s(%r, %r, accel=%r, direction=%r, speed=%r, "
@property
def finished(self):
+ """Check if this bullet is finished running."""
for action in self.actions:
if not action.finished:
return False
self.actions = []
def replace(self, old, new):
+ """Replace an active action with another."""
try:
idx = self.actions.index(old)
except ValueError:
self.actions[idx] = new
def step(self):
+ """Advance by one frame."""
created = []
for action in self.actions:
created.extend(action.step())
direction = math.radians(self.direction)
+ self.px = self.x
+ self.py = self.y
self.x += self.mx + math.sin(direction) * self.speed
self.y += self.my - math.cos(direction) * self.speed
@classmethod
def FromDoc(cls, doc, params=(), x=0, y=0, speed=0, direction=0,
target=None, rank=0.5):
+ """Construct a bullet from top-level actions in a document."""
actions = [act(params, rank) for act in doc.top]
return cls(x, y, direction, speed, target, actions, rank=rank)